//getting ALL JobCategory with all JobPost into 1 layer using specification
public async Task <IQueryable <JobCategoryViewModel> > GetAllJobCategoryWithJobPost()
{
IQueryable <JobCategoryViewModel> query;
var alist = await _jobCategoryRepository.getAllJobCategoryWithJobPost();
query = alist.ProjectTo <JobCategoryViewModel>(_mapper.ConfigurationProvider);
return(query);
}